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    <title>Document</title>
    <style>
        li:hover{
            /* 字体大小 */
            font-size: 20px;
            /* 字体粗细 */
            font-weight:bold;
            /* 字体倾斜 */
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            color: blue;
            /* 字体样式 */
            font-family: "微软雅黑";
        }
        .box{
            width: 300px;
            height: 300px;
            /* 边框 粗细 实线 颜色 */
            border: 1px solid black;
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        p{
            /* 居中 */
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            /* 下划线 删除线 ：line-through*/
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        }

        a{
            text-decoration: none;
            color: black;
        }
    </style>
</head>
<body>
    <div class="box">
        <ul>
            <li>篮球</li>
            <li>足球</li>
            <li>排球</li>
        </ul>
        <p>今天很开心</p>
        <a href="#">关于这些</a>
    </div>
</body>
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